ProLabs uses B2B quote model - prices require reseller account and are
not shown publicly (schema.org always shows price=0.00). Fighting
CloudFront WAF with Firefox automation is pointless.
New approach:
- Sitemap-driven: downloads all 14 sitemaps to collect product URLs
- fetch-based: curl-compatible HTTP requests bypass CloudFront TLS detection
- catalog-only: writes part numbers + specs to transceivers table
- Rate-limited: 300ms between requests (~3 req/sec)
- No proxy needed: Pi nodes no longer consumed for ProLabs
6febb9c88e